terminal: Prevent extra character on handled meta keystrokes (#14151)
Denis Washington
created
On macOS, when `terminal.option_as_meta` is enabled, pressing key
combinations like `option+b` and `option+f` would lead to both an escape
sequence being sent to the terminal (the expected behavior with
`option_as_meta == true`) AND a character being inserted (the behavior
when `option_as_meta == false`). Prevent the latter by stopping
propagation of the key-down event if it corresponds to a terminal escape
sequence and `option_as_meta` is enabled.
Fixes #7728
Release Notes:
- Fixed insertion of extra characters for some keystrokes if
`terminal.option_as_meta` is enabled
([#7728](https://github.com/zed-industries/zed/issues/7728)).